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From 7e1ae687916fd5878ee755afbdea6b10494e0b92 Mon Sep 17 00:00:00 2001
From: Alexey Firago <alexey_firago@mentor.com>
Date: Wed, 26 Jul 2017 23:21:25 +0300
Subject: [PATCH] cmake: Install libcares.pc
Prepare and install libcares.pc file during cmake build, so libraries
using pkg-config to find libcares will not fail.
Signed-off-by: Alexey Firago <alexey_firago@mentor.com>
---
CMakeLists.txt | 21 +++++++++++++++++++++
libcares.pc.cmakein | 20 ++++++++++++++++++++
2 files changed, 41 insertions(+)
create mode 100644 libcares.pc.cmakein
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 364b6c7..0016b67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,21 +173,29 @@ ADD_DEFINITIONS(${SYSFLAGS})
# Tell C-Ares about libraries to depend on
+# Also pass these libraries to pkg-config file
+SET(CARES_PRIVATE_LIBS_LIST)
IF (HAVE_LIBRESOLV)
LIST (APPEND CARES_DEPENDENT_LIBS resolv)
+ LIST (APPEND CARES_PRIVATE_LIBS_LIST "-lresolv")
ENDIF ()
IF (HAVE_LIBNSL)
LIST (APPEND CARES_DEPENDENT_LIBS nsl)
+ LIST (APPEND CARES_PRIVATE_LIBS_LIST "-lnsl")
ENDIF ()
IF (HAVE_LIBSOCKET)
LIST (APPEND CARES_DEPENDENT_LIBS socket)
+ LIST (APPEND CARES_PRIVATE_LIBS_LIST "-lsocket")
ENDIF ()
IF (HAVE_LIBRT)
LIST (APPEND CARES_DEPENDENT_LIBS rt)
+ LIST (APPEND CARES_PRIVATE_LIBS_LIST "-lrt")
ENDIF ()
IF (WIN32)
LIST (APPEND CARES_DEPENDENT_LIBS ws2_32)
+ LIST (APPEND CARES_PRIVATE_LIBS_LIST "-lws2_32")
ENDIF ()
+string (REPLACE ";" " " CARES_PRIVATE_LIBS "${CARES_PRIVATE_LIBS_LIST}")
# When checking for symbols, we need to make sure we set the proper
@@ -489,6 +497,13 @@ CONFIGURE_FILE (ares_build.h.cmake ${PROJECT_BINARY_DIR}/ares_build.h)
# Write ares_config.h configuration file. This is used only for the build.
CONFIGURE_FILE (ares_config.h.cmake ${PROJECT_BINARY_DIR}/ares_config.h)
+# Pass required CFLAGS to pkg-config in case of static library
+IF (CARES_STATIC)
+ SET (CPPFLAG_CARES_STATICLIB "-DCARES_STATICLIB")
+ENDIF()
+
+# Write ares_config.h configuration file. This is used only for the build.
+CONFIGURE_FILE (libcares.pc.cmakein ${PROJECT_BINARY_DIR}/libcares.pc @ONLY)
# TRANSFORM_MAKEFILE_INC
#
@@ -625,6 +640,12 @@ IF (CARES_INSTALL)
INSTALL (FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake" DESTINATION ${CMAKECONFIG_INSTALL_DIR})
ENDIF ()
+# pkg-config file
+IF (CARES_INSTALL)
+ SET (PKGCONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+ INSTALL (FILES "${CMAKE_CURRENT_BINARY_DIR}/libcares.pc" DESTINATION ${PKGCONFIG_INSTALL_DIR})
+ENDIF ()
+
# Legacy chain-building variables (provided for compatibility with old code).
# Don't use these, external code should be updated to refer to the aliases directly (e.g., Cares::cares).
SET (CARES_FOUND 1 CACHE INTERNAL "CARES LIBRARY FOUND")
diff --git a/libcares.pc.cmakein b/libcares.pc.cmakein
new file mode 100644
index 0000000..f29fede
--- /dev/null
+++ b/libcares.pc.cmakein
@@ -0,0 +1,20 @@
+#***************************************************************************
+# Project ___ __ _ _ __ ___ ___
+# / __|____ / _` | '__/ _ \/ __|
+# | (_|_____| (_| | | | __/\__ \
+# \___| \__,_|_| \___||___/
+#
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+
+Name: c-ares
+URL: http://daniel.haxx.se/projects/c-ares/
+Description: asynchronous DNS lookup library
+Version: @VERSION@
+Requires:
+Requires.private:
+Cflags: -I${includedir} @CPPFLAG_CARES_STATICLIB@
+Libs: -L${libdir} -lcares
+Libs.private: @CARES_PRIVATE_LIBS@
--
2.7.4
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